Diacetates 1 and N-[(1-benzotriazol-l-yl)alkyl]amides 2, both masked forms of aldehydes, could undergo deprotection and condensation with cycloalkanones in a one-pot procedure promoted by samarium(III) iodide (SmI3) ...Diacetates 1 and N-[(1-benzotriazol-l-yl)alkyl]amides 2, both masked forms of aldehydes, could undergo deprotection and condensation with cycloalkanones in a one-pot procedure promoted by samarium(III) iodide (SmI3) to afford α,α'-bis(substituted benzylidene) cycloalkanones in good yields.展开更多
采用尿素和N,N-二甲基-1,3-丙二胺在常压下加热反应合成了1,3-双[3-(二甲胺基)丙基]脲(DPU),考察了反应温度、反应时间对DPU产率和粘度的影响,将不同条件下合成的DPU与二氯乙醚反应生成二氨基脲聚合物(PUB),并与PUB对照品进行比较。研...采用尿素和N,N-二甲基-1,3-丙二胺在常压下加热反应合成了1,3-双[3-(二甲胺基)丙基]脲(DPU),考察了反应温度、反应时间对DPU产率和粘度的影响,将不同条件下合成的DPU与二氯乙醚反应生成二氨基脲聚合物(PUB),并与PUB对照品进行比较。研究表明,在反应温度140℃,反应时间6 h条件下合成的DPU产率为91.8%,粘度290 c P。此条件下合成的DPU与二氯乙醚反应生成的PUB的色泽和粘度与对照品最接近。展开更多
文摘Diacetates 1 and N-[(1-benzotriazol-l-yl)alkyl]amides 2, both masked forms of aldehydes, could undergo deprotection and condensation with cycloalkanones in a one-pot procedure promoted by samarium(III) iodide (SmI3) to afford α,α'-bis(substituted benzylidene) cycloalkanones in good yields.
文摘采用尿素和N,N-二甲基-1,3-丙二胺在常压下加热反应合成了1,3-双[3-(二甲胺基)丙基]脲(DPU),考察了反应温度、反应时间对DPU产率和粘度的影响,将不同条件下合成的DPU与二氯乙醚反应生成二氨基脲聚合物(PUB),并与PUB对照品进行比较。研究表明,在反应温度140℃,反应时间6 h条件下合成的DPU产率为91.8%,粘度290 c P。此条件下合成的DPU与二氯乙醚反应生成的PUB的色泽和粘度与对照品最接近。